BUILD ?= build

ECHO = @echo

RM = /bin/rm

MKDIR = /bin/mkdir

PYTHON = python3

MPY_CROSS = $(MPY_DIR)/mpy-cross/mpy-cross

MPY_TOOL = $(PYTHON) $(MPY_DIR)/tools/mpy-tool.py

MPY_LD = $(PYTHON) $(MPY_DIR)/tools/mpy_ld.py

Q = @

ifeq ("$(origin V)", "command line")

ifeq ($(V),1)

Q =

MPY_LD += '-vvv'

ARCH_UPPER = $(shell echo $(ARCH) | tr '[:lower:]' '[:upper:]')

CONFIG_H = $(BUILD)/$(MOD).config.h

CFLAGS += -I. -I$(MPY_DIR)

CFLAGS += -std=c99

CFLAGS += -Os

CFLAGS += -Wall -Werror -DNDEBUG

CFLAGS += -DNO_QSTR

CFLAGS += -DMICROPY_ENABLE_DYNRUNTIME

CFLAGS += -DMP_CONFIGFILE='<$(CONFIG_H)>'

CFLAGS += -fpic -fno-common

CFLAGS += -U _FORTIFY_SOURCE # prevent use of __*_chk libc functions

MPY_CROSS_FLAGS += -march=$(ARCH)

SRC_O += $(addprefix $(BUILD)/, $(patsubst %.c,%.o,$(filter %.c,$(SRC))))

SRC_MPY += $(addprefix $(BUILD)/, $(patsubst %.py,%.mpy,$(filter %.py,$(SRC))))

ifeq ($(ARCH),x86)

CROSS =

CFLAGS += -m32 -fno-stack-protector

MICROPY_FLOAT_IMPL ?= double

else ifeq ($(ARCH),x64)

CROSS =

CFLAGS += -fno-stack-protector

MICROPY_FLOAT_IMPL ?= double

else ifeq ($(ARCH),armv7m)

CROSS = arm-none-eabi-

CFLAGS += -mthumb -mcpu=cortex-m3

MICROPY_FLOAT_IMPL ?= none

else ifeq ($(ARCH),armv7emsp)

CROSS = arm-none-eabi-

CFLAGS += -mthumb -mcpu=cortex-m4

CFLAGS += -mfpu=fpv4-sp-d16 -mfloat-abi=hard

MICROPY_FLOAT_IMPL ?= float

else ifeq ($(ARCH),armv7emdp)

CROSS = arm-none-eabi-

CFLAGS += -mthumb -mcpu=cortex-m7

CFLAGS += -mfpu=fpv5-d16 -mfloat-abi=hard

MICROPY_FLOAT_IMPL ?= double

else ifeq ($(ARCH),xtensa)

CROSS = xtensa-lx106-elf-

CFLAGS += -mforce-l32

MICROPY_FLOAT_IMPL ?= none

else ifeq ($(ARCH),xtensawin)

CROSS = xtensa-esp32-elf-

CFLAGS +=

MICROPY_FLOAT_IMPL ?= float

$(error architecture '$(ARCH)' not supported)

MICROPY_FLOAT_IMPL_UPPER = $(shell echo $(MICROPY_FLOAT_IMPL) | tr '[:lower:]' '[:upper:]')

CFLAGS += -DMICROPY_FLOAT_IMPL=MICROPY_FLOAT_IMPL_$(MICROPY_FLOAT_IMPL_UPPER)

CFLAGS += $(CFLAGS_EXTRA)

.PHONY: all clean

all: $(MOD).mpy

clean:

$(RM) -rf $(BUILD) $(CLEAN_EXTRA)

BUILD_DIRS = $(sort $(dir $(CONFIG_H) $(SRC_O) $(SRC_MPY)))

$(CONFIG_H) $(SRC_O) $(SRC_MPY): | $(BUILD_DIRS)

$(BUILD_DIRS):

$(Q)$(MKDIR) -p $@

$(CONFIG_H): $(SRC)

$(ECHO) "GEN $@"

$(Q)$(MPY_LD) --arch $(ARCH) --preprocess -o $@ $^

$(BUILD)/%.o: %.c $(CONFIG_H) Makefile

$(ECHO) "CC $<"

$(Q)$(CROSS)gcc $(CFLAGS) -o $@ -c $<

$(BUILD)/%.mpy: %.py

$(ECHO) "MPY $<"

$(Q)$(MPY_CROSS) $(MPY_CROSS_FLAGS) -o $@ $<

$(BUILD)/$(MOD).native.mpy: $(SRC_O)

$(ECHO) "LINK $<"

$(Q)$(MPY_LD) --arch $(ARCH) --qstrs $(CONFIG_H) -o $@ $^

$(MOD).mpy: $(BUILD)/$(MOD).native.mpy $(SRC_MPY)

$(ECHO) "GEN $@"

$(Q)$(MPY_TOOL) --merge -o $@ $^